I know this might not help now but I think its D but I will let you know for sure in a minute or two
Answer:
Allows the reader to be 'all-knowing'
Explanation:
The omniscient narrator allows the reader inside the heads of the characters to know the different thoughts of Beatrice, Luma, and even Jeremiah.
Its a great book and move :D read it last year
They had a happy ending because they felt like they got justice and free rain over the socs when they won the battle and like they avenged what Johnny did.